The wildfire risk has climbed to the highest level so far, with Valais now under "very high danger" and open fires banned across several cantons.
The warning covers Sion, Sierre, Montana, Fully and other Valais districts, where 30-degree heat and prolonged drought have left forests tinder-dry.
Ticino and Graubünden are historically most exposed, though no canton is entirely safe.
More Swiss firefighters head to France
A second team of 33 firefighters from French speaking Switzerland will travel to south-western France this weekend to relieve colleagues battling the wildfires.
French wildfire smoke drifts
Smoke from the wildfires ravaging south-western France has drifted into Switzerland, the federal weather service MétéoSuisse says.
Unions demand hot weather orders
Geneva's construction workers remain on the job despite soaring temperatures, prompting fresh criticism from the SIT union.
Brighter economic prediction
Switzerland's short-term economic outlook has brightened in July, according to the KOF barometer released yesterday.
Annemasse municipal police attacked
Two Annemasse municipal officers have been attacked by a woman this week, in the latest incident to fuel concerns about violence in the cross-border town.
Geneva and Vaud have the cheapest pools
Geneva and Vaud have the cheapest public pools, according to a new comparison of 268 sites released as another heatwave bakes the country.
